Comment by judge2020

None of the big providers offer always-free VMs, but if you could just ping the registry endpoint, Lambda might be able to do it since you get 3.2 million seconds of compute "always free"[0]. Same for Google Cloud Run, although it's only 1GB egress a month[1], and Azure Functions[2].

0: https://aws.amazon.com/free/?all-free-tier.sort-by=item.addi...

1: https://cloud.google.com/free#always-free-products_5

2: https://azure.microsoft.com/en-us/free/free-account-faq/